Copolymerization
Subject classification: this is a chemistry resource. 
Aims edit
 Statistical free radical copolymerization
 Copolymer composition
Introduction edit
 Polymerization of two or more monomers
 Properties of the polymer depend on monomer composition and time
Statistical copolymerization edit
RM1• + M1 → RM1M1  rate=k_{11}[RM1•][M1] 
RM1• + M2 → RM1M2  rate=k_{12}[RM1•][M2] 
RM2• + M1 → RM2M1  rate=k_{21}[RM2•][M1] 
RM2• + M2 → RM2M2  rate=k_{22}[RM2•][M2] 
 Monomers are consumed at different rates
 Therefore the polymer composition changes during the reaction
Instantaneous copolymer equation

Reactivity ratios
and
r_{A} < 1 → CROSS propagation preferred 